Cowling Installation - Hangar 9 HAN2990 Instruction Manual

184. Use medium CA to glue the fuel tank braces in the
fuselage. Slide the fuel tank back against the rear brace
once the CA fully cures.
The fuel tank can also be secured in the
fuselage using hook and loop straps or tie-wraps.

COWLING INSTALLATION

Trim the Radial Engine, EP ONLY.
185. Trim the dummy radial engine as shown to allow cooling
air to pass across the ESC. Remove the material in the
center of the dummy radial for the propeller shaft and
drive washer for your particular motor.
Trim the Radial Engine, GAS ONLY.
186. Trim the dummy radial engine to allow air to pass
over the engine and to clear the carburetor. Remove
the material in the center of the dummy radial for the
propeller shaft and drive washer for your particular
engine.
187. Use sandpaper to remove the paint from the dummy
radial where it contacts the inside of the cowling. This
will increase the bond of the adhesive to the dummy
radial. Use 15-minute epoxy to glue the radial engine
inside the cowling. Allow the epoxy to fully cure before
proceeding.
188. Attach the cowling mounts to the fuselage using M3 x
10 socket head cap screws, M3 washers and M3 lock
washers. Leave the mounts loose enough that they can
be aligned with the cowling in the following steps.
Use care not to cross-thread the screws in the
blind nuts when attaching the cowl mounts.
EN
184.
185.
186.
187.
188.
189. Slide the cowling into position. Attach the propeller to the
motor shaft using the hardware included with the engine.
Position the cowling so the propeller is equal distance
from the cowling at the top and bottom.
190. Check the left right alignment of the cowling now as well.
191. Mark the location of the mounts on the inside of the
cowling using a felt-tipped pen. Make sure the cowling
does not move when making these marks. Note if the
mounts fi t fl at to the inside of the cowling.
The cowl mounts can also be tack glued
to the cowl using medium CA. Be careful not
to accidentally glue the mounts to the tabs, or
get glue in the threads of the blind nuts.
192. Remove the propeller and cowling. Use medium grit
sandpaper to sand the mounts to make sure they fi t
tightly against the cowling.
If the mounts do not fit tightly they may come
loose after they are glued to the cowling.
193. Sand the area inside the cowling where the mounts rest.
Use a paper towel and isopropyl alcohol to remove any
oils or debris from the inside of the cowling.
Preparation for gluing the mounts is important
to guarantee the adhesive can properly bond
the mounts to the inside of the cowling.
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189.
190.
191.
192.
193.